Terraform module to create AWS VPC Flow logs backed by S3.
This project is part of our comprehensive "SweetOps" approach towards DevOps.
It's 100% Open Source and licensed under the APACHE2.
We literally have hundreds of terraform modules that are Open Source and well-maintained. Check them out!
The module will create:
- S3 bucket with server side encryption
- KMS key to encrypt flow logs files in the bucket
- Optional VPC Flow Log backed by the S3 bucket (this can be disabled, e.g. in multi-account environments if you want to create an S3 bucket in one account and VPC Flow Logs in different accounts)
IMPORTANT: The master branch is used in source just as an example. In your code, do not pin to master because there may be breaking changes between releases.
Instead pin to the release tag (e.g. ?ref=tags/x.y.z) of one of our latest releases.
For a complete example, see examples/complete.
For automated tests of the complete example using bats and Terratest (which tests and deploys the example on Datadog), see test.
module "vpc" {
source = "cloudposse/vpc/aws"
version = "0.18.0"
namespace = "eg"
stage = "test"
name = "flowlogs"
cidr_block = "172.16.0.0/16"
}
module "flow_logs" {
source = "cloudposse/vpc-flow-logs-s3-bucket/aws"
version = "0.8.0"
namespace = "eg"
stage = "test"
name = "flowlogs"
vpc_id = module.vpc.vpc_id
}Available targets:
help Help screen
help/all Display help for all targets
help/short This help short screen
lint Lint terraform code
| Name | Version |
|---|---|
| terraform | >= 0.12.0 |
| aws | >= 2.0 |
| local | >= 1.3 |
| template | >= 2.2 |
| Name | Version |
|---|---|
| aws | >= 2.0 |
| Name | Description | Type | Default | Required |
|---|---|---|---|---|
| additional_tag_map | Additional tags for appending to tags_as_list_of_maps. Not added to tags. |
map(string) |
{} |
no |
| arn_format | ARN format to be used. May be changed to support deployment in GovCloud/China regions | string |
"arn:aws" |
no |
| attributes | Additional attributes (e.g. 1) |
list(string) |
[] |
no |
| context | Single object for setting entire context at once. See description of individual variables for details. Leave string and numeric variables as null to use default value.Individual variable settings (non-null) override settings in context object, except for attributes, tags, and additional_tag_map, which are merged. |
object({ |
{ |
no |
| delimiter | Delimiter to be used between namespace, environment, stage, name and attributes.Defaults to - (hyphen). Set to "" to use no delimiter at all. |
string |
null |
no |
| enabled | Set to false to prevent the module from creating any resources | bool |
null |
no |
| environment | Environment, e.g. 'uw2', 'us-west-2', OR 'prod', 'staging', 'dev', 'UAT' | string |
null |
no |
| expiration_days | Number of days after which to expunge the objects | number |
90 |
no |
| flow_log_enabled | Enable/disable the Flow Log creation. Useful in multi-account environments where the bucket is in one account, but VPC Flow Logs are in different accounts | bool |
true |
no |
| force_destroy | A boolean that indicates all objects should be deleted from the bucket so that the bucket can be destroyed without error. These objects are not recoverable | bool |
false |
no |
| glacier_transition_days | Number of days after which to move the data to the glacier storage tier | number |
60 |
no |
| id_length_limit | Limit id to this many characters.Set to 0 for unlimited length.Set to null for default, which is 0.Does not affect id_full. |
number |
null |
no |
| label_order | The naming order of the id output and Name tag. Defaults to ["namespace", "environment", "stage", "name", "attributes"]. You can omit any of the 5 elements, but at least one must be present. |
list(string) |
null |
no |
| lifecycle_prefix | Prefix filter. Used to manage object lifecycle events | string |
"" |
no |
| lifecycle_rule_enabled | Enable lifecycle events on this bucket | bool |
true |
no |
| lifecycle_tags | Tags filter. Used to manage object lifecycle events | map(string) |
{} |
no |
| name | Solution name, e.g. 'app' or 'jenkins' | string |
null |
no |
| namespace | Namespace, which could be your organization name or abbreviation, e.g. 'eg' or 'cp' | string |
null |
no |
| noncurrent_version_expiration_days | Specifies when noncurrent object versions expire | number |
90 |
no |
| noncurrent_version_transition_days | Specifies when noncurrent object versions transitions | number |
30 |
no |
| regex_replace_chars | Regex to replace chars with empty string in namespace, environment, stage and name.If not set, "/[^a-zA-Z0-9-]/" is used to remove all characters other than hyphens, letters and digits. |
string |
null |
no |
| stage | Stage, e.g. 'prod', 'staging', 'dev', OR 'source', 'build', 'test', 'deploy', 'release' | string |
null |
no |
| standard_transition_days | Number of days to persist in the standard storage tier before moving to the infrequent access tier | number |
30 |
no |
| tags | Additional tags (e.g. map('BusinessUnit','XYZ') |
map(string) |
{} |
no |
| traffic_type | The type of traffic to capture. Valid values: ACCEPT, REJECT, ALL |
string |
"ALL" |
no |
| vpc_id | VPC ID to create flow logs for | string |
null |
no |
| Name | Description |
|---|---|
| bucket_arn | Bucket ARN |
| bucket_domain_name | FQDN of bucket |
| bucket_id | Bucket Name (aka ID) |
| bucket_prefix | Bucket prefix configured for lifecycle rules |
| flow_log_arn | Flow Log ARN |
| flow_log_id | Flow Log ID |
| kms_alias_arn | KMS Alias ARN |
| kms_alias_name | KMS Alias name |
| kms_key_arn | KMS Key ARN |
| kms_key_id | KMS Key ID |
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Check out these related projects.
- terraform-aws-vpc - Terraform Module that defines a VPC with public/private subnets across multiple AZs with Internet Gateways
- CIS AWS Foundations Benchmark in the AWS Cloud - CIS Benchmarks are consensus-based configuration guidelines developed by experts in US government, business, industry, and academia to help organizations assess and improve security
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 Erik Osterman |
 Andriy Knysh |
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